Institute Newton C. Braga

Circuit Bench

Proximity Alarm (CB16505E)
This proximity (capacitive) alarm triggers a relay that, in turn, triggers an audible warning...
SCR Rain or Leak Alarm (CB22097E)
This sensitive circuit was found in old documentation. The SCR can be any of the 106 series and...
Light Triggered Oscillator (CB14950E)
This traditional multivibrator configuration uses an LDR as a sensor. The circuit emits sound when...